/**
 */
package com.sky.dis.om.rpr.presentation;


import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.StringTokenizer;

import org.eclipse.emf.common.util.URI;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EClassifier;

import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;

import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;

import org.eclipse.emf.ecore.EObject;

import org.eclipse.emf.ecore.xmi.XMLResource;

import org.eclipse.emf.edit.ui.provider.ExtendedImageRegistry;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.jface.dialogs.MessageDialog;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.wizard.Wizard;
import org.eclipse.jface.wizard.WizardPage;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.ModifyEvent;

import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;

import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;

import com.sky.dis.om.rpr.RprFactory;
import com.sky.dis.om.rpr.RprPackage;
import com.sky.dis.om.rpr.provider.RprEditPlugin;


import java.io.File;

import org.eclipse.jface.operation.IRunnableWithProgress;

import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Text;


/**
 * This is a simple wizard for creating a new model file.
 * <!-- begin-user-doc -->
 * <!-- end-user-doc -->
 * @generated
 */
public class RprModelWizard extends Wizard implements INewWizard {
    /**
     * The supported extensions for created files.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    public static final List<String> FILE_EXTENSIONS =
        Collections.unmodifiableList(Arrays.asList(RprEditorPlugin.INSTANCE.getString("_UI_RprEditorFilenameExtensions").split("\\s*,\\s*")));

    /**
     * A formatted list of supported file extensions, suitable for display.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    public static final String FORMATTED_FILE_EXTENSIONS =
        RprEditorPlugin.INSTANCE.getString("_UI_RprEditorFilenameExtensions").replaceAll("\\s*,\\s*", ", ");

    /**
     * This caches an instance of the model package.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    protected RprPackage rprPackage = RprPackage.eINSTANCE;

    /**
     * This caches an instance of the model factory.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    protected RprFactory rprFactory = rprPackage.getRprFactory();

    /**
     * This is the initial object creation page.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    protected RprModelWizardInitialObjectCreationPage initialObjectCreationPage;

    /**
     * Remember the selection during initialization for populating the default container.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    protected IStructuredSelection selection;

    /**
     * Remember the workbench during initialization.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    protected IWorkbench workbench;

    /**
     * Caches the names of the types that can be created as the root object.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    protected List<String> initialObjectNames;

    /**
     * This just records the information.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    public void init(IWorkbench workbench, IStructuredSelection selection) {
        this.workbench = workbench;
        this.selection = selection;
        setWindowTitle(RprEditorPlugin.INSTANCE.getString("_UI_Wizard_label"));
        setDefaultPageImageDescriptor(ExtendedImageRegistry.INSTANCE.getImageDescriptor(RprEditorPlugin.INSTANCE.getImage("full/wizban/NewRpr")));
    }

    /**
     * Returns the names of the types that can be created as the root object.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    protected Collection<String> getInitialObjectNames() {
        if (initialObjectNames == null) {
            initialObjectNames = new ArrayList<String>();
            for (EClassifier eClassifier : rprPackage.getEClassifiers()) {
                if (eClassifier instanceof EClass) {
                    EClass eClass = (EClass)eClassifier;
                    if (!eClass.isAbstract()) {
                        initialObjectNames.add(eClass.getName());
                    }
                }
            }
            Collections.sort(initialObjectNames, java.text.Collator.getInstance());
        }
        return initialObjectNames;
    }

    /**
     * Create a new model.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    protected EObject createInitialModel() {
        EClass eClass = (EClass)rprPackage.getEClassifier(initialObjectCreationPage.getInitialObjectName());
        EObject rootObject = rprFactory.create(eClass);
        return rootObject;
    }

    /**
     * Do the work after everything is specified.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    @Override
    public boolean performFinish() {
        try {
            // Get the URI of the model file.
            //
            final URI fileURI = getModelURI();
            if (new File(fileURI.toFileString()).exists()) {
                if (!MessageDialog.openQuestion
                        (getShell(),
                         RprEditorPlugin.INSTANCE.getString("_UI_Question_title"),
                         RprEditorPlugin.INSTANCE.getString("_WARN_FileConflict", new String []{ fileURI.toFileString() }))) {
                    initialObjectCreationPage.selectFileField();
                    return false;
                }
            }
            
            // Do the work within an operation.
            //
            IRunnableWithProgress operation = new IRunnableWithProgress() {
                public void run(IProgressMonitor progressMonitor) {
                        try {
                            // Create a resource set
                            //
                            ResourceSet resourceSet = new ResourceSetImpl();

                            // Create a resource for this file.
                            //
                            Resource resource = resourceSet.createResource(fileURI);

                            // Add the initial model object to the contents.
                            //
                            EObject rootObject = createInitialModel();
                            if (rootObject != null) {
                                resource.getContents().add(rootObject);
                            }

                            // Save the contents of the resource to the file system.
                            //
                            Map<Object, Object> options = new HashMap<Object, Object>();
                            options.put(XMLResource.OPTION_ENCODING, initialObjectCreationPage.getEncoding());
                            resource.save(options);
                        }
                        catch (Exception exception) {
                            RprEditorPlugin.INSTANCE.log(exception);
                        }
                        finally {
                            progressMonitor.done();
                        }
                    }
                };

            getContainer().run(false, false, operation);

            return RprEditorAdvisor.openEditor(workbench, fileURI);			
        }
        catch (Exception exception) {
            RprEditorPlugin.INSTANCE.log(exception);
            return false;
        }
    }

    /**
     * This is the page where the type of object to create is selected.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    public class RprModelWizardInitialObjectCreationPage extends WizardPage {
        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        protected Text fileField;

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        protected Combo initialObjectField;

        /**
         * @generated
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         */
        protected List<String> encodings;

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        protected Combo encodingField;

        /**
         * Pass in the selection.
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        public RprModelWizardInitialObjectCreationPage(String pageId) {
            super(pageId);
        }

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        public void createControl(Composite parent) {
            Composite composite = new Composite(parent, SWT.NONE); {
                GridLayout layout = new GridLayout();
                layout.numColumns = 1;
                layout.verticalSpacing = 12;
                composite.setLayout(layout);

                GridData data = new GridData();
                data.verticalAlignment = GridData.FILL;
                data.grabExcessVerticalSpace = true;
                data.horizontalAlignment = GridData.FILL;
                composite.setLayoutData(data);
            }
            
            Label resourceURILabel = new Label(composite, SWT.LEFT);
            {
                resourceURILabel.setText(RprEditorPlugin.INSTANCE.getString("_UI_File_label"));

                GridData data = new GridData();
                data.horizontalAlignment = GridData.FILL;
                resourceURILabel.setLayoutData(data);
            }

            Composite fileComposite = new Composite(composite, SWT.NONE);
            {
                GridData data = new GridData();
                data.horizontalAlignment = GridData.END;
                fileComposite.setLayoutData(data);

                GridLayout layout = new GridLayout();
                data.horizontalAlignment = GridData.FILL;
                layout.marginHeight = 0;
                layout.marginWidth = 0;
                layout.numColumns = 2;
                fileComposite.setLayout(layout);
            }

            fileField = new Text(fileComposite, SWT.BORDER);
            {
                GridData data = new GridData();
                data.horizontalAlignment = GridData.FILL;
                data.grabExcessHorizontalSpace = true;
                data.horizontalSpan = 1;
                fileField.setLayoutData(data);
            }

            fileField.addModifyListener(validator);

            Button resourceURIBrowseFileSystemButton = new Button(fileComposite, SWT.PUSH);
            resourceURIBrowseFileSystemButton.setText(RprEditorPlugin.INSTANCE.getString("_UI_Browse_label"));

            resourceURIBrowseFileSystemButton.addSelectionListener
                (new SelectionAdapter() {
                     @Override
                     public void widgetSelected(SelectionEvent event) {
                         String[] filters = RprEditor.FILE_EXTENSION_FILTERS.toArray(new String[RprEditor.FILE_EXTENSION_FILTERS.size()]);
                         String[] files = RprEditorAdvisor.openFilePathDialog(getShell(), SWT.SAVE, filters);
                         if (files.length > 0) {
                             fileField.setText(files[0]);
                         }
                     }
                 });
            Label containerLabel = new Label(composite, SWT.LEFT);
            {
                containerLabel.setText(RprEditorPlugin.INSTANCE.getString("_UI_ModelObject"));

                GridData data = new GridData();
                data.horizontalAlignment = GridData.FILL;
                containerLabel.setLayoutData(data);
            }

            initialObjectField = new Combo(composite, SWT.BORDER);
            {
                GridData data = new GridData();
                data.horizontalAlignment = GridData.FILL;
                data.grabExcessHorizontalSpace = true;
                initialObjectField.setLayoutData(data);
            }

            for (String objectName : getInitialObjectNames()) {
                initialObjectField.add(getLabel(objectName));
            }

            if (initialObjectField.getItemCount() == 1) {
                initialObjectField.select(0);
            }
            initialObjectField.addModifyListener(validator);

            Label encodingLabel = new Label(composite, SWT.LEFT);
            {
                encodingLabel.setText(RprEditorPlugin.INSTANCE.getString("_UI_XMLEncoding"));

                GridData data = new GridData();
                data.horizontalAlignment = GridData.FILL;
                encodingLabel.setLayoutData(data);
            }
            encodingField = new Combo(composite, SWT.BORDER);
            {
                GridData data = new GridData();
                data.horizontalAlignment = GridData.FILL;
                data.grabExcessHorizontalSpace = true;
                encodingField.setLayoutData(data);
            }

            for (String encoding : getEncodings()) {
                encodingField.add(encoding);
            }

            encodingField.select(0);
            encodingField.addModifyListener(validator);

            setPageComplete(validatePage());
            setControl(composite);
        }

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        protected ModifyListener validator =
            new ModifyListener() {
                public void modifyText(ModifyEvent e) {
                    setPageComplete(validatePage());
                }
            };

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        protected boolean validatePage() {
            URI fileURI = getFileURI();
            if (fileURI == null || fileURI.isEmpty()) {
                setErrorMessage(null);
                return false;
            }

            String extension = fileURI.fileExtension();
            if (extension == null || !FILE_EXTENSIONS.contains(extension)) {
                String key = FILE_EXTENSIONS.size() > 1 ? "_WARN_FilenameExtensions" : "_WARN_FilenameExtension";
                setErrorMessage(RprEditorPlugin.INSTANCE.getString(key, new Object [] { FORMATTED_FILE_EXTENSIONS }));
                return false;
            }

            setErrorMessage(null);
            return getInitialObjectName() != null && getEncodings().contains(encodingField.getText());
        }

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        @Override
        public void setVisible(boolean visible) {
            super.setVisible(visible);
            if (visible) {
                initialObjectField.clearSelection();
                encodingField.clearSelection();
                fileField.setFocus();
            }
        }

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        public String getInitialObjectName() {
            String label = initialObjectField.getText();

            for (String name : getInitialObjectNames()) {
                if (getLabel(name).equals(label)) {
                    return name;
                }
            }
            return null;
        }

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        public String getEncoding() {
            return encodingField.getText();
        }

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        public URI getFileURI() {
            try {
                return URI.createFileURI(fileField.getText());
            }
            catch (Exception exception) {
                // Ignore
            }
            return null;
        }

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        public void selectFileField() {
                initialObjectField.clearSelection();
                encodingField.clearSelection();
                fileField.selectAll();
                fileField.setFocus();
        }		

        /**
         * Returns the label for the specified type name.
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        protected String getLabel(String typeName) {
            try {
                return RprEditPlugin.INSTANCE.getString("_UI_" + typeName + "_type");
            }
            catch(MissingResourceException mre) {
                RprEditorPlugin.INSTANCE.log(mre);
            }
            return typeName;
        }

        /**
         * <!-- begin-user-doc -->
         * <!-- end-user-doc -->
         * @generated
         */
        protected Collection<String> getEncodings() {
            if (encodings == null) {
                encodings = new ArrayList<String>();
                for (StringTokenizer stringTokenizer = new StringTokenizer(RprEditorPlugin.INSTANCE.getString("_UI_XMLEncodingChoices")); stringTokenizer.hasMoreTokens(); ) {
                    encodings.add(stringTokenizer.nextToken());
                }
            }
            return encodings;
        }
    }

    /**
     * The framework calls this to create the contents of the wizard.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
        @Override
    public void addPages() {
        initialObjectCreationPage = new RprModelWizardInitialObjectCreationPage("Whatever2");
        initialObjectCreationPage.setTitle(RprEditorPlugin.INSTANCE.getString("_UI_RprModelWizard_label"));
        initialObjectCreationPage.setDescription(RprEditorPlugin.INSTANCE.getString("_UI_Wizard_initial_object_description"));
        addPage(initialObjectCreationPage);
    }

    /**
     * Get the URI from the page.
     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    public URI getModelURI() {
        return initialObjectCreationPage.getFileURI();
    }

}
